Electric radiator



W. R. SAVAGE.

ELECTRIC RADIATOR.

AFPLICAilON man APR. 1-0. 191's.

1 ,330,904:. Patented Feb. 17,1920.

2 SHEETS-$HEET I- r F5 1 m W. R. SAVAGE. ELECTRIC RADIATOR. APPLICATIONFILED APR. 10. I915.

Patented Feb. 17 1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

WILL R. SAVAGE, OF OMAHA, NEBRASKA.

ELESTRIC RADIATOR.

Application filed April in, 1915.

To all whom it may concern.-

Be it known that I, WILL R. SAVAGE, a citizen of the Unites- States,residing at Omaha, in the county of Douglas and State of Nebraska, haveinvented certain new and useful Improvements in Electric Radiators, ofwhich the following is a specification.

This invention relates to electric radiators.

One object is to provide an electric heating means for radiatorsembodying among other characteristics a double threaded windingresistance multiple series or three heat combination in such form orarrangement that a single, double or quadruple heat may be establishedin the heating means and uniformly distributed from end to end of theradiator to heat the water uniformly in all the sections of theradiator.

Another object resides in the provision of an electric radiator whereinthe heating means is compact and easily applied to the radiator andeasily removed therefrom if desired.

A still further object is to provide an electric heating device forradiators in which the heating means is inclosed in a tube whose endsare closed and which is located in a conduit at the bottom of theradiator and at its ends supported by bushings removably connected tothe end sections of the radiator, one of the bushings being chambered tosnugly but loosely receive the corresponding end of the tube andprovided with passages to establish communication between the radiatorsections and the chamber of the chambered bushing around the adjacentend of the tube with said chambered bushing provided with an open?leading from its chamber so that various valved devices may beinterchangeably connected with the chambered bushing for differentpurposes.

It is still further designed to provide a heating means for electricradiators wherein the partsmay be easily assembled or disassembled andwherein when the parts are assembled different electrical connectionsmay be easily and'readily applied to the heating means for the purposeofoperating the heating means under a single, double or quadruple heatapplication.

With the above and other objects in View, the present invention consistsin the combination and arrangement of parts hereinafter more fullydescribed, illustrated in the Specification of Letters Patent.

Patented Feb. 17, 1920.

Serial No. 20,561.

accompanying drawings and particularly pointed out in the appendedclaims, it being understood that changes may be made in the form,proportion, size and minor details without departing from the spirit orsacriiicing any of the advantages of. the invention.

In the drawings:

Figure 1 is alongitudinal sectional View through the lower portion of asectional radiator illustrating my heating device in elevation.

Fig. 2 is a front view of a portion of a sectional radiator, partly insection illustrat ing a valved connection for the supply of water to theradiator.

Fig. 3 is a similar view illustrating the application thereto of avalved draining device.

Fig. 4 is a front elevation of a portion of a sectional radiatorillustrating my improved heating device located therein and to which isalso connected a gage glass.

Fig. 5 is a transverse sectional view on the line 55 of Fig. 1.

Fig. 6 is a detail view partly in longitudinal section and partly inelevation illustrating my improved heating means.

F 7 is an end view of the ported bushing looking from the insidethereof, the same being applied and showing the heating means.

Fig. 8 is a side elevation of the rear end of the heating elementdisposed. within the ported bushing 27.

Fig. 9 is an elevation of the heating core in one condition and partlybroken away, illustrating the supporting rod for the core and alsoshowing the multiple series circuits wound thereon and connected totheir terminals.

Fig. 10 is an end view of that part of the invention which isillustrated in Fig. 9.

Fig. 11 is a diagram of the multiple series circuits formed on the coreillustrated in Fig. 9.

Fig. 12 is a face view of the metallic ring which has connection withthe core suppor*'- ing rod at the rear end of the latter andillustrating the two rear terminals to which the multiple seriescircuits are connected at the rear end of the heating device.

Fig. 13 is a face view of the collar mounted on the end of bushing 25andan end view of the bushing64.

Fig. 14 is a detail view illustrating a form of bushing which may besubstituted for the bushing 27.

Referring now more in detail to the accompanying drawings, theradiatoris shown as composed of sections 20 whose lower ends havecommunicating passages 21 formed by the connecting nipples 22, providinga conduit adjacent the bottom of the radiator. The end sections havescrew threaded open ings 23 and 24 disposed in alinement with saidconduit.

A bushing-25 has its inner end exteriorly screw threaded, as at'26 forremovable fit in the aforesaid screw threaded opening 23 at one end ofthe radiator. A chambered eX- teriorly screw threaded bushing 27 hasdetachable connection in the screw threaded opening 24 at the oppositeend of the radiator. The chambered portion 31 of this bushing 27 looselyreceives one end of the heating means inclosing tube 28 so that as thebushing 27 is manipulated to screw it into the screw threaded opening atthe corresponding end ofthe radiator, the chambered portion of thebushing rotates or swivels over the corresponding endof the inclosingtube 28.

The end of the tube which fits in the chambered portion of the bushing27 is closed by a plug or the like 29 which is preferably screwed intothe tube. This screw threaded connection between the tube and plug maybe sealed by welding, soldering, or otherwise, if desired, to preventleakage.

The bushing 27 is provided witha plurality'of grooves 30 formed in thewalls of its chamber so as to establish communication between theadjacent radiator section and the chamber "31 of the bushing'27 fromwhich chamber leads ascrew threaded opening 32 formed in the head of thebushing 27 This screw threaded opening a 32 is adapted to'detachablyreceive any suitable connection for passing water through the bushing byway of the passages 30 into or out of, the radiator. For instance, asshown in Fig, 2 a nipple 33 is connected in the screwthreaded opening 32for the connectiontherewith of the valved pipe 34 of a water main bymeans of which the radiator may be supplied with water.

there ;may be substituted, if desired, a

valved drain cock connection 35 or instead For this valved pipe 34 andnipple connection 33- tion of the radiator.

The tube 28 incloses the heating means and, as shown particularly inFigs. 6and 9, there is shown a Lavite or other suitable non-conductingcor 38 for the support of the multiple series circuits 39 and 39'. Thisinsulating core 38 is shown as formedof one piece but it is obvious thatit may be formed in sections arranged end to end, and this sectlonalarrangement 1t 1s thought'entlrely unnecessary to illustrate. Whetherthecore be formed in one piece or in sections, it is supported on asuitable metallic rod 40 which fits snugly within the core and which hasits ends projecting beyond'the ends of the coreand reduced, as indicatedat 41 and 42. The core is held against lateral displacement on the rod40 by collars 43 and 45. The metallic'collar 43 is screwed on to thereduced end 42 of the rod and the collar which is preferably ofinsulating material is screwed on to the reduced end 41' of the rod,engaging the annular internal shoulder of the bushing 25. The metalliccollar 43 and the corresponding end of the rod 40 are preferably spacedslightly from the plug 29 of the tube 28 to provide an insulating-spacea between the plug 29 and the collar 43 and the rod 40. This insulatingspace a permits of slight expansion of the supporting rod in the corewithoutdanger of breaking the latter. Both or" said collars fit normallysnugly against the respective ends of the core.

The insulating collar 45 is provided with in diameter to allow for therequired-space between the terminals 47, 48 and 49 and the supportingrod 40 so as to prevent or lessen the chances for short circuiting.

1 he bushing 25 has its outer face provided with a plurality of screwthreaded sockets'53 adapted to take suitable screw threaded fastenings54 designed to secure the metallic cap 55 against the outer face of thebushing 25and which cap is provided with an .internalannual shoulder 56.

A fiber bushing 57 is supported by said metallic cap 55. This may beaccomplishec by providing the inner end of the fiber bushing 57 with aradial annular flange 59 adapted to engage the internal annular shoulder56 of the cap 55. This fiber bushing 57 carries metallic sleeves 60through which the aforesaid terminals 47, 48 and 49 project. The innerends of these sleeves 6O engage the burs 61 mounted on said terminals47, 48 and 49 in the cooling space 62 between the insulating collar 45and the fiber bushing 57 and by means of burs 67 the fiber bushing 57and sleeves 60 are held in close engagement with burs 61. The coolingspace 62 prevents direct contact of the fiber bushing 57 with theheating element.

The outer end of the fiber bushing 57 is reduced to form an annularshoulder 63 to receive the fiber cap 64 which may be se cured on saidshoulder by means of suitable fastenings 65. These fastenings 65preferably have screw threaded connection with the fiber bushing 57 andthe cap 64 provides a space 66 for the outer ends of the terminals 47,48 and 49. The outer ends of the terminals 47, 48 and 49 are screwthreaded to receive the binding burs 67 and the fiber cap 64 has anoutlet 68 for the passage of the wires or combined insulating cord whichmay lead from a suitable source of supply (not shown). The removal ofthis outer cap 634 exposes the terminals to easy access in connectingthe wires from the source of supply and the extended terminals withfiber coverings provide for good insulation of the wires beyond the endof the tube and the inclosing cap which renders the same less subject toinjury by close contact to direct heat of the coil.

The core 38 may be heated by various arrangements. One way is to providefor a double threaded winding resistance multiple series or three heatcombination in such form that the single, double or quadruple heat towhich the core is subjected is uniformly distributed from end to end-0fthe core and the inclosing tube, thus heating the water uniformly ineach and every section of the radiator. To these ends the core may havean external double thread to form the spiral grooves 69 and 70, theformer to receive the wire 71 and the latter to take the wire 72. Thewires 71 and 72 are connected at one of their ends to the metalliccollar 43 by the terminals 44 and 44, respectively, with their oppositeends connected to the terminals 48 and 49, respectively, by the bindingnuts 73 and 74, respectively. The collar 43, being connected to the coresupporting rod 40, there is thus effected an intersecting of thecomplete winding in the middle at one end of the core.

The core supporting rod 40 forms a support for the core and also acts asa return conductor in the double or quadruple heats. It will beunderstood that the core on which the resistance wires are wound neednot necessarily be grooved, as stated, but may be smooth and wire ribbonor round wire used. In any event, the winding should be equallyinterspaced and int rwound between each other after the fashion of thedouble thread principle. lVhether the core be smooth or grooved afterthe winding of the resistances thereon or in the grooves, theintervening space between the core and the walls of the inclosing tube28 m -y be filled, if desired, by any suitable non-conducting material,as shown in Fig. 6, and the filling material and the core made integralso as to exclude all air from this space which would normally remainbetween the core of Fig. 9 and the tube 28.

In Fig. 14 is shown a bushing 27' adapted to be substituted for thebushing 27, if desired, and which is adapted to have swiveled connectionwith one end of the tube 28. This modified form of bushing 27 hasneither the outlet 32 nor the passages 30 of the bushing 27, but is inthe form of a smooth bore chambered bushing without ports.

From the foregoing it will be understood that the current may undercertain con ditions pass into the core through one resistance and outthrough the other; that under other conditions the current may passthrough one resistance and return through the supporting rod 40; andthat under other conditions the current may pass into the core throughboth resistances with the supporting rod 40 acting as a common returnfor both resistances whereby I provide for a single, double or quadrupleheat application uniformly distributed.

This case in part embraces portions of the subject matter of myapplication for electric radiators filed August 21, 1913, Serial. No.785,970.

What is claimed is:

1. A heating element for radiators comprising a hollow core ofnon-conducting ma terial, a supporting rod for said core fitted closelytherein and at its ends projecting beyond the ends of the core with theprojecting ends reduced and screw threaded, a metallic collar secured onone of the reduced screw threaded ends of the rod and engaging thecorresponing end of the core, an insulating collar engaging the oppositer duced screw threaded end of the rod and engaging the corresponding endof the core, resistance wire terminals connected to both of saidcollars, a metallic connection between said rod and one of the terminalsof one of said collars, a double threaded winding resistance connectionbetween the terminals of said collars, and a casing for said core.

2. A heating element for radiators comprising a hollow core ofnon-conducting material, a supporting rod for the core, a metalliccollar secured to one end of the rod and engaging the corresponding endof the core, an insulating collar engaging the opposite end of the rodand engaging the corresponding end of the core, resistance Wireterminals connected to both of th-e'collars, a metallic connectionbetween said rod and one of the terminals oi the insulating collar, adouble threaded Winding resistance connection between the terminals ofsaid collars, and a casing for the core.

3. A heating element for radiators comprising a hollow core ofnon-conducting material, a supporting rod for the core, a metalliccollar secured to one end of the rod and engaging the corresponding endof the core, an insulating collar secured to the other end of the rodand engaging the corresponding end of the core, resistance ire terminalsconnected to both of said collars, a double threaded Winding resistanceconnection between the terminals of said collars, and means connectingthe intermediate terminal of the insulating collar With said rod Wherebythe rod may form the return for one of said resistances or the returncommon to both of said resistances. V

In testimony whereof I affix my signature in presence of a Witness.

WILL R. SAVAGE. Witness:

D. O. BARNELL.-

